1 /*
2 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include "jvmci/jvmciCodeInstaller.hpp"
25 #include "jvmci/jvmciRuntime.hpp"
26 #include "jvmci/jvmciCompilerToVM.hpp"
27 #include "jvmci/jvmciJavaClasses.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/handles.inline.hpp"
30 #include "runtime/sharedRuntime.hpp"
31 #include "vmreg_aarch64.inline.hpp"
32
33 jint CodeInstaller::pd_next_offset(NativeInstruction* inst, jint pc_offset, Handle method, TRAPS) {
34 if (inst->is_call() || inst->is_jump() || inst->is_blr()) {
35 return pc_offset + NativeCall::instruction_size;
36 } else if (inst->is_general_jump()) {
37 return pc_offset + NativeGeneralJump::instruction_size;
38 } else {
39 JVMCI_ERROR_0("unsupported type of instruction for call site");
40 }
41 }
42
43 void CodeInstaller::pd_patch_OopConstant(int pc_offset, Handle constant, TRAPS) {
44 address pc = _instructions->start() + pc_offset;
45 #ifdef ASSERT
46 {
47 NativeInstruction *insn = nativeInstruction_at(pc);
48 if (HotSpotObjectConstantImpl::compressed(constant)) {
49 // Mov narrow constant: movz n << 16, movk
50 assert(Instruction_aarch64::extract(insn->encoding(), 31, 21) == 0b11010010101 &&
51 nativeInstruction_at(pc+4)->is_movk(), "wrong insn in patch");
52 } else {
53 // Move wide constant: movz n, movk, movk.
54 assert(nativeInstruction_at(pc+4)->is_movk()
55 && nativeInstruction_at(pc+8)->is_movk(), "wrong insn in patch");
56 }
57 }
58 #endif // ASSERT
59 Handle obj(THREAD, HotSpotObjectConstantImpl::object(constant));
60 jobject value = JNIHandles::make_local(obj());
61 MacroAssembler::patch_oop(pc, (address)obj());
62 int oop_index = _oop_recorder->find_index(value);
63 RelocationHolder rspec = oop_Relocation::spec(oop_index);
64 _instructions->relocate(pc, rspec);
65 }
66
67 void CodeInstaller::pd_patch_MetaspaceConstant(int pc_offset, Handle constant, TRAPS) {
68 address pc = _instructions->start() + pc_offset;
69 if (HotSpotMetaspaceConstantImpl::compressed(constant)) {
70 narrowKlass narrowOop = record_narrow_metadata_reference(_instructions, pc, constant, CHECK);
71 MacroAssembler::patch_narrow_klass(pc, narrowOop);
72 TRACE_jvmci_3("relocating (narrow metaspace constant) at " PTR_FORMAT "/0x%x", p2i(pc), narrowOop);
73 } else {
74 NativeMovConstReg* move = nativeMovConstReg_at(pc);
75 void* reference = record_metadata_reference(_instructions, pc, constant, CHECK);
76 move->set_data((intptr_t) reference);
77 TRACE_jvmci_3("relocating (metaspace constant) at " PTR_FORMAT "/" PTR_FORMAT, p2i(pc), p2i(reference));
78 }
79 }
80
81 void CodeInstaller::pd_patch_DataSectionReference(int pc_offset, int data_offset, TRAPS) {
82 address pc = _instructions->start() + pc_offset;
83 NativeInstruction* inst = nativeInstruction_at(pc);
84 if (inst->is_adr_aligned() || inst->is_ldr_literal()) {
85 address dest = _constants->start() + data_offset;
86 _instructions->relocate(pc, section_word_Relocation::spec((address) dest, CodeBuffer::SECT_CONSTS));
87 TRACE_jvmci_3("relocating at " PTR_FORMAT " (+%d) with destination at %d", p2i(pc), pc_offset, data_offset);
88 } else {
89 JVMCI_ERROR("unknown load or move instruction at " PTR_FORMAT, p2i(pc));
90 }
91 }
92
93 void CodeInstaller::pd_relocate_ForeignCall(NativeInstruction* inst, jlong foreign_call_destination, TRAPS) {
94 address pc = (address) inst;
95 if (inst->is_call()) {
96 NativeCall* call = nativeCall_at(pc);
97 call->set_destination((address) foreign_call_destination);
98 _instructions->relocate(call->instruction_address(), runtime_call_Relocation::spec());
99 } else if (inst->is_jump()) {
100 NativeJump* jump = nativeJump_at(pc);
101 jump->set_jump_destination((address) foreign_call_destination);
102 _instructions->relocate(jump->instruction_address(), runtime_call_Relocation::spec());
103 } else if (inst->is_general_jump()) {
104 NativeGeneralJump* jump = nativeGeneralJump_at(pc);
105 jump->set_jump_destination((address) foreign_call_destination);
106 _instructions->relocate(jump->instruction_address(), runtime_call_Relocation::spec());
107 } else {
108 JVMCI_ERROR("unknown call or jump instruction at " PTR_FORMAT, p2i(pc));
109 }
110 TRACE_jvmci_3("relocating (foreign call) at " PTR_FORMAT, p2i(inst));
111 }
112
113 void CodeInstaller::pd_relocate_JavaMethod(CodeBuffer &cbuf, Handle hotspot_method, jint pc_offset, TRAPS) {
114 #ifdef ASSERT
115 Method* method = NULL;
116 // we need to check, this might also be an unresolved method
117 if (hotspot_method->is_a(HotSpotResolvedJavaMethodImpl::klass())) {
118 method = getMethodFromHotSpotMethod(hotspot_method());
119 }
120 #endif
121 switch (_next_call_type) {
122 case INLINE_INVOKE:
123 break;
124 case INVOKEVIRTUAL:
125 case INVOKEINTERFACE: {
126 assert(method == NULL || !method->is_static(), "cannot call static method with invokeinterface");
127 NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
128 _instructions->relocate(call->instruction_address(), virtual_call_Relocation::spec(_invoke_mark_pc));
129 call->trampoline_jump(cbuf, SharedRuntime::get_resolve_virtual_call_stub());
130 break;
131 }
132 case INVOKESTATIC: {
133 assert(method == NULL || method->is_static(), "cannot call non-static method with invokestatic");
134 NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
135 _instructions->relocate(call->instruction_address(), relocInfo::static_call_type);
136 call->trampoline_jump(cbuf, SharedRuntime::get_resolve_static_call_stub());
137 break;
138 }
139 case INVOKESPECIAL: {
140 assert(method == NULL || !method->is_static(), "cannot call static method with invokespecial");
141 NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
142 _instructions->relocate(call->instruction_address(), relocInfo::opt_virtual_call_type);
143 call->trampoline_jump(cbuf, SharedRuntime::get_resolve_opt_virtual_call_stub());
144 break;
145 }
146 default:
147 JVMCI_ERROR("invalid _next_call_type value");
148 break;
149 }
150 }
151
152 void CodeInstaller::pd_relocate_poll(address pc, jint mark, TRAPS) {
153 switch (mark) {
154 case POLL_NEAR:
155 JVMCI_ERROR("unimplemented");
156 break;
157 case POLL_FAR:
158 _instructions->relocate(pc, relocInfo::poll_type);
159 break;
160 case POLL_RETURN_NEAR:
161 JVMCI_ERROR("unimplemented");
162 break;
163 case POLL_RETURN_FAR:
164 _instructions->relocate(pc, relocInfo::poll_return_type);
165 break;
166 default:
167 JVMCI_ERROR("invalid mark value");
168 break;
169 }
170 }
171
172 // convert JVMCI register indices (as used in oop maps) to HotSpot registers
173 VMReg CodeInstaller::get_hotspot_reg(jint jvmci_reg, TRAPS) {
174 if (jvmci_reg < RegisterImpl::number_of_registers) {
175 return as_Register(jvmci_reg)->as_VMReg();
176 } else {
177 jint floatRegisterNumber = jvmci_reg - RegisterImpl::number_of_registers_for_jvmci;
178 if (floatRegisterNumber >= 0 && floatRegisterNumber < FloatRegisterImpl::number_of_registers) {
179 return as_FloatRegister(floatRegisterNumber)->as_VMReg();
180 }
181 JVMCI_ERROR_NULL("invalid register number: %d", jvmci_reg);
182 }
183 }
184
185 bool CodeInstaller::is_general_purpose_reg(VMReg hotspotRegister) {
186 return !hotspotRegister->is_FloatRegister();
187 }